Alessia's Bulwark is part of the base game. Crafting stations for this set are located in Alik'r Desert (Alezer Kotu), Malabal Tor (Chancel of Divine Entreaty) and Eastmarch (Hammerhome). You can craft any armor, jewelry or weapon with this set in any motif style you know, as long as you have 5 traits researched (per item). You can trade crafted pieces to other players. Each set item becomes bound on equip.